UPG and Modern Practice

So I like history, that's no secret to anyone who's interacted with me for more than five minutes. When it comes to my spirituality, I do have some reconstructionist tendencies. Say, for getting to know deities... the cultures they came from gave them particular meanings, some specific to the culture, they worshiped them for hundreds, if not thousands of years, established their rites, and so on. These people knew their gods, and I think we'd be kinda silly to ignore the surviving knowledge and understandings these people had.

Some people tend to see that, and think oh, hey, this person is stuck in the past, they don't like anything modern. Which isn't true. Hell, I wouldn't even flat out call myself a reconstructionist. I'm not at all against modern practices, creations, and I'm not against unverified personal gnosis. (UPG - the idea that I might have a particular spiritual practice that doesn't necessarily apply to others, and isn't 'verified' by sources from antiquity.) I have partaken in modern rites (Her Sacred Fires, for example?), I have made my own modern associations for the deities I have built relationships with.

What bothers me is when people try to pass of these things as ancient, when they're not. Like, the Ancient Greeks didn't offer pumpkins to Hekate on Oct 31st, because the ancient Greeks didn't have pumpkins, nor did they have a calendar that would easily correspond to our idea of Oct 31st. Does it mean no one should do this? Nope, if you feel called to it, go for it... just, you know, don't paint it as something it's not. Don't tell me this is what the Ancient Greeks did. That sort of thing doesn't help anyone, and only makes it more confusing for those seeking out the historical side of things.

I am not at all against modern practices... but don't call them something they're not. If the practice is valid, even if only for you, you don't need to take a fake history onto it to make it sound better.