Or that they are doing legal shit that has the appearance of doing illegal shit, and will get into a lot of trouble more trouble than they want if it ever goes to trial.

Nobody stops you from texting your friends about buying ten pounds of cocaine, (when you actually meant confectioner's sugar), but putting it in writing may make your life more difficult if at some point, by happenstance, you might end up the defendant in a narcotics trial. Even if you are completely innocent.