We've had this discussion many, many times. I certainly see the risk of creep, but I think the answer to most of this is as follows.

On a pretty basic level, we all agree on what are IT "core values." Stock motors. Stock suspension mounting points. Stock body panels. Stock tranny ratios. Stock brakes. With limited mods inside each of those categories.

I really do think 99% of us would not have an issue with what everyone else would do if king for a day. Would there be some conflict? Sure. But on items like washer bottles and evap cannisters, no.