Meg Mitchell, long hair can become wrapped around the legs, feet, and toes of birds, rodents, and other smaller critters creating a tourniquet effect. I’m a registered veterinary nurse in California USA and have seen this firsthand in domestic pets. I have colleagues who work in wildlife rehab and they frequently advise against leaving hair, yarn bits, string, etc. out for wildlife to make use of for the same reasons.
People used to make elaborate collages and mandalas out of the hair of loved ones. A google search for “Victorian hair art” will show many examples. Or paintbrushes? Maybe something artistic would be a better option for your collected hair?