“anonymized” sure. I highly doubt they read every message. I’m sure there is lots of de-anonymizing information in the messages themselves

For example–

Anon1: “hey jeff, wanna play Minecraft?”

Anon2: “sure”

Thus we know Anon2’s name is Jeff. I imagine there’s a lot of this.

I use gimp but OP isn’t wrong. Doing a stroke on text is mindless in Photoshop and very convoluted in gimp.