I'm very wary of them as come from a slum background where they emerged en mass at night to feed. It was grim.
In care I trained in laundry work and they would come in on albs, humerial veils. and habits as well as sheets. They don't care who you are or how well or badly you live.
Later as a young live in hotel worker, they'd crawl across my friend to eat me.
Donkeys years later s an adult we got a sudden invasion in a van, and a couple traveled into the house. It literally only takes one pregnant one, they multiply swiftly.
Managed to control and stop the house becoming infested by very strict regimes, procedures and heat traps, Systematically sorted the van using chemicals, isolation and quarantine but we only escaped the worst because we acted quickly and I have an underlying paranoia of 'contamination.'
There's a very big difference between trying to deal with the elimination of a handful of them when you know and catch them early, which is what most are dealing with them coming in on holiday luggage, and the reality of actual infestation, which is when you move a wicker head board (what we'd put in the van from a very posh house) and the surface of it suddenly swarms with all different generational sizes and they're dropping off it, or you wake at night to find yourself with 30/40 on you and your bedding. (childhood)
Many houses and flats round here have them, both rich and poor. The rich claim the poorer are to blame, but it's often actually their Dc's returning from uni halls who are their main means of transmission.
Leaving a meeting in a London office recently, randomly discovered a live adult walking boldly up colleagues coat in the middle of the day. It didn't come from her home, (I tore it apart for her!) the office is all non soft furnishings, no carpet etc and no signs of it being them, so we suspect it was simply carried and transferred by another participant hanging up their coat. They in turn may have bought it from a hotel, or from their home, no way of knowing.