Interesting example of the debated issue.
European specialist in fly family, has an already RG ID trumped by an autosuggest from new user.
Judging by the other 25 IDs of new user…this appears totally inadvertent (seems strange they even happened across this observation).
Regardless of how much energy this might or might not take folks to over-turn, what concerns me is just that these kind of events might cause frustration / be off-putting for the specialist in question.
As @joe_fish suggested here, perhaps there could be consideration at least to the power an autosuggested ID has?