"The 50 rep rule for commenting should be removed because its so annoying."
- It takes seconds to get 50 rep. The time you took to type this you could have used to answer several questions and get to 50 reputation.
- It prevents abuse.
... results in
You are abusing the Ask Ubuntu site to post a complaint about the rules. A user worthy commenting on questions on Ask Ubuntu would have known to post this on META (or a truly useful user would have searched the questions on META and realise it has been asked and answered before).
I would rather see a threshold for posting questions...