No, they aren't. But for the most part you have little to fear from spiders. Many aren't disposed to bite people, plenty are too small for effective venom delivery and almost all of them would rather run away from confrontation, and preferentially, avoid it altogether. There are isolated cases like the brazilian wandering spiders (Phoneutria), which are potentially lethal and in the case of Phoneutria spp. they have a serious attitude problem, to the extent I've read about someone trying to squash one with a broom, and the spider sprinting up the broom intent , presumably, given their nature, of venting it's spleen and lodging a pair of formal complaints within the owner of said broom. So to speak. But they aren't wild in n.america. Do have one hell of a temper though, going from what I've heard from those who've had them as pets. Furious is how they were described, and lightening quick. Not one I'd pick as a pet given the danger of the bite and difficulty keeping them . But most spiders really are a good thing, if you can get used to them, and if not, then treat them with respect rather than killing them. Although I figure the face cream thing wasn't intended that way. They hunt down and kill lots of far nastier, more pestiferous critters that would otherwise try and get into our food, transmit diseases etc. Better a few spiders than mosquitos and flies coming to the dinner table who's last meal was served on a dog turd plate, on a dog turd table, and featured...erm....would you believe me if I said a light, fruity crisp red wine with steak and chips? (before it had fallen to the floor and passed through a family dog, however)
And ladybirds are no threat either, the worst they are capable of is exuding nasty smelling haemolymph, which they do as a defensive measure when threatened. Or giving a slight nip, possibly with their jaws, since they are predatory (on aphids usually, the larvae especially are voraceous greenfly/blackfly exterminators ) but again, this iis MOST unlikely ever to come to pass, since they really are not aggressive at all and would only bite if say, pressed on whilst already wandering over exposed skin, so again, the answer is to respect their territory and leave them unmolested. They are doing you a favour by ridding you of all manner of pests and sources of disease.
Not a special interest though, the comment about brown and black widows and their temperament, comes from having had them as pets. Although pets that were murrdered.
They, and hundreds of baby widow spiders died because of deliberate malice, directed at me, by the fucking filth, when they again raided my place hoping to find something to pin on me (they failed)
I warned the pigs that there were my pets, where the y were to avoid them getting knocked over. one of my female widow spiders had just laid 2 egg sacks recently to the event., and the fucking murdering bastards came and trashed the place. When I got back, despite making it quite clear exactly what and where they were, and that they were pets. I returned to find every single one of them dead, hundreds of babies, their mother, and the other adult widows. Even the other egg sack was gone.