The "class" column should be allowed to have more than 7 characters

I'm currently writing a module called "activity_log" and I'd like to use a class by that name as well. Unfortunately it gets cut off at "activit" because the class column is restricted to 7 characters. Similarly I can see a use for a "taxonomy" class or a "taxonomy_term" class or some other arbitrary-length type. The longest I've ever seen in practice is 14: "taxonomy_vocab" is the name of the data type Rules uses for vocabularies (although I can see it being "taxonomy_vocabulary" as well -- 19 characters) but I would recommend 32 characters as a fair limit.