As far as I know, the use of trans-fats such as hydrogenated vegetable oil was encouraged in years past by the federal govt, in order to reduce the use of saturated fats.
Recent research has determined that 
trans fats are unhealthy at any level of consumption.Has the federal govt done anything to reverse the use of trans fats now that they know they are bad for us?
Actually the FDA issued rules about trans fat labeling, which is now forcing many snack manufacturers to remove the trans fat or list it on the label.
Many manufacturers started including trans fats in their processed foods about 20 years ago to prolong their products' shelf life, but public health experts warn that these kinds of fats clog arteries and cause obesity. 
http://www.umm.edu/features/transfats.html
"Numerous studies have found that trans fats raise our risk of heart disease," said Cynthia Payne, a registered dietitian at the University of Maryland Medical Center. "They can also contribute to an increase in total cholesterol levels and a drop in the healthy HDL cholesterol. 
These man-made fats are much worse for you than any other natural fat, even the saturated fats found in butter and beef." 
Why Have Trans Fatty Acids been Put in So Many Food Products?
No human body has any need for these man-made fats. Food manufacturers started putting them in products because they allow for a longer shelf life. Crackers, for example, can stay on the shelf and stay crispy for years in part because of the hydrogenated fats in them. 
Are Trans Fats Bad for Kids?
Trans fats increase the risk for heart disease. Therefore, children who start at age 3 or 4 eating a steady diet of fast food, pop tarts, commercially prepared fish sticks, stick margarine, cake, candy, cookies and microwave popcorn can be expected to get heart disease earlier than kids who are eating foods without trans fats.
While a person may not get heart disease until they are in their 40s, some of our research here at the University of Maryland has shown that kids as young as 8, 9 and 10 already have the high cholesterol and blood fats that clog arteries. By starting healthy eating habits early, parents can help their children avoid heart attacks and stroke. 
http://www.bantransfats.com/
Who is BanTransFats.com?
We are the organization that sued Kraft in 2003 to eliminate trans fat in Oreos. 
Result: Kraft eliminated trans fat from Oreos and reduced or eliminated it in about 650 other products. Click here and here for information.
The Oreo lawsuit had a huge "domino" effect. The publicity that the lawsuit received created public awareness about the trans fat issue and triggered an avalanche of events including the FDA labeling rule.
We are the organization that sued McDonald's in 2003 for misleading its customers into believing that it had switched to a lower trans fat cooking oil. 
Result: As a result of the litigation, McDonald's agreed to inform its customers that it had not changed to the lower trans fat cooking oil by placing prominent notices in all of its restaurants nationwide and in the media. It also agreed to pay $7 million to the American Heart Association for a trans fat program. Click here for information.
To sum it up for you:
Trans fats are bad for you in any amount.
The only reason it is used is for the longer shelf life of products, ie convenience.
Removing trans fat from your fried food won't adversely the taste.