Honestly, I think telling panic sellers to leave the space and not to invest in it is just the right message.
Well, actually it's the right message at the wrong time. We probably should have told panic sellers to go away when they were still panic buyers.
Most of those people panic selling now should probably never have invested to begin with. Buying out of FOMO is just as bad, if not worse, than selling out of fear because the sky is falling. I'm actually more worried about them than I'm about short- to mid-term market developments. But that's because I know where I stand and have entered the market out of conviction and not just out of greed. Well, maybe a little bit of greed.
The kind suggestions would have been 1) to never invest more than you can afford to lose and 2) to not invest into something you don't understand.
Once you're panic selling it shows you likely failed to follow at least one of these kind suggestions.
On a sidenote:
Good riddance. Those ads were mostly scams to begin with and rarely advertised projects of actual value.