If inclusiveness is really a goal, then I think the following should be considered:
(there'll be some repetition with others' ideas here... just emptying the noggin')
*wipe everybody's rep to zero
*If somebody negs another poster, then they also take a hit (something like 1/3rd of the negative value the negged poster receives is assigned to the poster who gives it). This would tamp down bickering through these channels somewhat. Plus, this idea is also interesting (this rep thing has always been a social experiment... at least make it more interesting, pls).
*remove seniority from the rep equation
*un-cap total rep
*leave in-place the limited number of reps someone can give over a defined window of time.
*make rep anonymous (many will still sign their rep messages, but it's nice to have the option to be anonymous)
*this may sound weird, but I think you should encourage everybody to change their screen names and avatars. I have my reasons for thinking this would help exfoliate things a little bit, but, seriously, just think about it. It creates a little extra work for the mods, but within a couple of days it'll be done.
*I like the idea of "likes" and "thanks" figuring into the rep equation. But, since "dislikes" can be given infinitely, I think they should not count. That'd cause a couple people to explode.
Negged