Can moderators lock user accounts?
If so, what are the main reasons that they would do so?
Moderators can suspend users for a certain number of days. From the blog:
If a moderator has warned you via email about behavior, and that behavior continues, for a period of 1 to 365 days, your account will be in timed suspension.
- Your account will be locked at 1 reputation.
- Your user page will have a visual indication that you are in timed suspension, and for how long.
- You will be unable to ask or answer questions.
At the end of this period, your reputation will be recalculated, and your account will resume as normal.