Some rules are great to keep the RP in the line it is meant to go. Point is, how strict is too strict? There's no single answer on that. I've seen RPs with a strict aging rule. Is that bad? Not at all! Granted, it'd take some of the fun away for me, but it's not a bad rule. Some have you required to join their site. Is that bad? Again, no, but then I don't want to join anymore.
With that in mind, a lot of rules can be put in that mindset. It's a personal opinion whether they're rules you'd rather not see when joining a roleplay group, but they're not bad. Of course there is such a thing as going too far with rules, which is why I said "a lot". For example, I've seen a ruleset that mentioned that you'd get kicked out of the group without warnings upon violating the rules... Ooo-kaaay?