Caveat: You own your identity only as long as you use did:web, and did:web is not much different from webfinger, which is what activitypub uses.

To clarify, the alternative (and default) is to use did:plc, which utilizes Bluesky (the company’s) centralized identity server. It isn’t possible to use other plc servers with any of the Bluesky clients either. Therefore, if you use did:plc it’s simple to get kicked off of.