|Regardless of what you do or don't do, we are all thankful that you even have this forum here. It is quite a boon to Quad vert skating.
: Absolutely correct. There are several benefits in implementing authentication and the one single disadvantage would be a slightly higher entry barrier (one could still allow unauthenticated post and just switch them off when there is a spam wave). I just won't enumerate all advantages that come to my mind or else the members of the forum will nag me to implement it. You can call me lazy for not having done it already, but it is a bit of work.