I used reddit under a normal username that I used everywhere for like 10 years. I didn't ever do anything, but did start to feel uncomfortable with the amount of data available to anyone interested. Discord was so much worse for me, I had years of chat logs with like thousands and thousands of messages. Modern governments have the potential to have so much information on people compared to before 1970. Like, there's a very big difference between getting a subponea for 100,000 messages in chat logs for 2010-2020 and having to talk to acquaintances of the person in the ways that investigations happened before the internet.
I don't know, I somewhat think there should be shorter time limits for how long chat logs can be used in courts.