I have noticed that questions are sometimes protected to prevent "thanks!", "me too!", or spam answers by new users. In order to answer those questions, you must have earned more than 10 reputation on the site.
But what if a new user has managed to gain more than 10 reputation in a single day, and then tried to post this kind of answer?
Shouldn't we make the rep requirement for answering protected questions even higher? Say 50 rep?