I'm afraid that there is nothing that will help making people aware of that. Even if the existing crypto coiners stop using exchanges as online wallets, the newbies who enter the market will replace them and make the same mistake.

At the end of the day, the speculative side of crypto makes people less interested in self storage, especially when it comes to shitcoins. People rather use an exchange to store them than having to search for clients and do it themselves.

I do however have to point out that there have been a few clients released in the last couple of months that allow people to conveniently store even the most trashy coins themselves.