ANYONE can file a complaint with any standing bar, per state or the ABA.Sorry, I must have misread an earlier post which I interpreted to mean that such a complaint usually IS/WAS filed by another attorney/member of the bar.
I'll reread.
Rules differ by state as to the process, but anyone can literally download the form of the site. Now, you are open to retribution for harassment or frivolous reports like anything, but that is addressed there as well.