SSing for trophies is perfectly fine and safe as long as you know what you are doing. It's not hard, understand how the score sender works (very easy) and you are set. Basically, find out how long you have to wait for each game. Don't make any guesses. Sometimes it's also a good idea to avoid the review score, but should you hit a review while waiting a good enough time for a game, with a legitimate looking score, then you will be fine.