Point 1 already applies to existing welfare programmes. It seems to me that if anything, the divide will be reduced by switching to the UBI model, as everyone gets it, not just those who fulfil certain criteria.
Point 2: I'm not convinced that UBI worsens the opportunity for predators, compared to how things stand today. Why would it?
Point 3: I'm not convinced this is likely to be a real problem. Today, different countries have different levels of welfare. I doubt people are less charitable in high-welfare countries (although this is just a guess), and overall, you're certainly better off being down-and-out in a high-welfare country.
Primarily anecdotal, but my experience (as a Dane married to an American) is that Americans are more likely to both give to charitable organizations and volunteer their time, whereas Danes are less likely to do so. Seems to be slightly backed up by this article (at least the volunteering part): https://www.theguardian.com/news/datablog/2010/sep/08/charit...
Also, I will add that when people on cash assistance in Denmark (kontanthjælp) do stupid things like spend all their money on alcohol, the general response seems not to be an offer of support but a "pull yourself together, you've got the means to do so". It definitely might just be the the circle I'm in, but thought I'd offer up my experience.
Point 2: I'm not convinced that UBI worsens the opportunity for predators, compared to how things stand today. Why would it?
Point 3: I'm not convinced this is likely to be a real problem. Today, different countries have different levels of welfare. I doubt people are less charitable in high-welfare countries (although this is just a guess), and overall, you're certainly better off being down-and-out in a high-welfare country.