Craig Mod makes some good point about deleting your tweets:
If an idea is any good, chances are you shouldn’t just be tweeting it, but rather giving it a more solid, fleshed out form as a blog post or essay or zine or whatever. This is out of respect for the idea itself. What I find most dangerous about Twitter is that it can generate similar chemical feelings to having done “the work,” when in fact, you haven’t done the work. You’ve just micro-plastic’d idea potential. Make Twitter ephemeral and it seems to undo this psychic voodoo. (For me, anyway.)
It makes sense to me. Also routinely deleting my old tweets gives me some control over one of my concerns with social media: using an old tweet against me. We’ve seen this before.
Sure, I’m not James Gunn, but because Twitter makes it very easy to post things online, we usually do it without thinking. Having these tweets still available years later can be problematic. We are changing, but our short angry bursts aren’t. These are sitting somewhere on Twitter as a record of a random bad snippet of us.
As Craig said, tweets should be ephemeral.