User generated content that needs to be manually approved...
Sure it would "deffinitely"* stop one specific feature abuse, but it would also make a gigantic tedious system for the PSO2 team to manange - not to mention limit how much SA's can be created. At that point may as well make it a feature only paying premium membership players can use.
I've said this idea in another thread, but simply say play time gating(not AFK activities) SA would significantly reduce abuse(if needed) - best of all that does not add a gigantic system for the PSO2 team to manage. For example needing one very high level character or the like, which would take a while to do. (used leveling as just an example, I'm not actually sure just how long would take to get to say 70 etc)
Trying to eliminate abuses 100% in my opinion is just impractical, and for this case would limit people making SA's. Not that I know anything about available resource's/manpower - that the PSO2 team has or don't have lol.
*funny thing about "deffinitely", there would highly likely still be approved things that someone will have an issue with - so even more stress for the PSO2 team. (as a little side note "keep everyone safe"... whenever you're "online", there is always a possibility of being "unsafe". Not an excuse for any inaction, but just saying)