While I won't say I don't take allegations like this seriously, I will say that I just don't care all that much what an actor does or thinks in his/her personal life.
Further being able to act and/or play a guitar well does not qualify you as my my role-model or hero .... so I don't have unrealistic expectations.
Finally after the damage done to Kevin Spacey in particular based on what turned out to be nonsense (put politely) I think it might be a good idea to find out what actually happened before jumping to judgement not just "believe" by default.
EDIT: Of course House of Cards being cancelled turned out not to matter since we've ended up with the "IRL" version!