Here is the scenario I’ve heard where someone claims they were charged with obstruction. To head off the cite requests it isn’t a news story. Lets say USA to keep it simple.
A mutual group of friends who hang out get joined by a new guy, new guy approaches several group members individually and asks if they can hook him up with hard drugs in a very odd blatant manner. They realize from talking to each other that he has approached more than one of them, so they email all their friends telling them what the new guy is doing and to stay away from the creep because he could be a police informant. The one who sent the email is then charged with obstruction of justice or something similar.
Is it plausible the charge would stick?