Are there any areas of Fort Collins that should be avoided?

Ok, so please forgive me if I'm not interpreting your question in the same manner that you were aiming for. If you're saying are there "bad" areas of town that are maybe a little bit shady...here's my response: Overall, I don't think there are any specific areas in Fort Collins that are dubbed as being "dangerous". However, Old Town on a Saturday can have it's incidences of drunk college kids being drunk college kids. My advice, if you're going around Old Town on a weekend night, use the buddy system. Make sure you're with someone or a group, as you should do anytime you're traveling at night in a city :)

all roads with red light cameras I'd avoid!