The threat has already been realized. Apparently a twitter user got into Pelosi's office and posted an screenshot of one of their computers (tweet deleted about an hour ago [1]). You can see the tweet at other sources [2]
[1] https://twitter.com/ElijahSchaffer/status/134690542554391757...
[2] https://arstechnica.com/tech-policy/2021/01/pro-trump-report...