You're kidding, right? Michael Rooker has been a busy character actor for decades. His acting resume eclipses Lou's by a mile.
Having said this, these celebrities charging for an autograph are embarrassing.
Why?
I used to work in a call centre which was 24 hours. Some of the overnight staff were heavily into the Sci-Fi shit especially conventions and meeting up and taking pictures with as many as possible (including Lou when he came to Australia). They would spend up to $70-90 easy on a paid photo with each one or even hundreds for a group shot, and it was deemed normal.
They should charge if people are willing to pay. Also having to deal with the stupid questions they get asked a lot which I've been told is like 'Uh....in Season 2 episode 4 you kissed 'Insert Stars name here'. How was that?' they should fucking charge. Sci-Fi is a lifelong money making ordeal at conventions and Lou is in it.