Purchasers will make snap judgements based on stereotyping. They have nothing else to go on. That’s what stereotyping is for, rightly or wrongly – for helping you make a decision when you don’t have much evidence to evaluate. Doesn’t make them bellends for erring on the side of caution.
There are worse things for them to see when they look over the fence – a rubbish dump full of dog shit and discarded nappies, half a dozen cars on bricks, or a handily placed sex pool, BBQ and sound system. Some people will even be put off by stuff like trampolines.
Seeing a flagpole in a well-tended garden might make me ask a gentle follow-up question about whether I’m likely to be reported to the council if I leave my bin out for too long. 🙂