Personally, I prefer peaches,,, makes the web pages sticky and lickable.
Seriously though, I just don't feel it excludes anyone in any way, as we may all participate in any of the conversation and free exchange of information and experiences, if we choose to. (with respect to everyone's perfection of course lol) It amounts to no more than a convenient electronic thank you bank. How can we hold it against anyone for thanking someone else, ESPECIALLY when they are helping out in noticeable ways that eases the workload? That exchange does not hinder anyone's access to the information, nor limit their participation. Perhaps it is not the conversation, or exchange of information that someone may feel excluded from. Reputation systems have been every forum I've ever participated in and on those I've managed.
There always seemed to be folks that fixated on the rep system. lol