Speaking on the morality part of it...well...morals differ from person to person, so of course there's going to be some arguing about it.
The way I look at it...if the government (federal, state, local) is subsidizing it, then it's really no different than claiming a tax credit. Getting free healthcare because the government considers you poor? As long as you're not lying about the situation, I think it's no different than claiming the child tax credit (again, assuming you're not lying and counting your fur babies as regular babies). Getting SNAP benefits is no different than getting an ACA subsidy, even if you have to juggle some numbers around. If you technically qualify for government funds, then you technically qualify. Rich people do this all the time, why can't common people? Oh, because they're common...that's a bit of a recurring theme actually.
Where I draw the line is government program vs charity. If it's a government program that has set rules (that I follow), I have no problem taking advantage. If it's a charity...even if I qualify, I'm not taking advantage of it (unless I have an actual need, even then I probably wouldn't unless it was for my kids). Driving down the road to pick up free school meals twice a week, I have no problem with...they're being funded by the federal government (and the less people that take advantage of the program, the less funds the school gets...eventually it means people lose their job). Driving the other direction once a week to a location that not only gives out free school meals, but also some extra goodies from the food bank? Nope. We don't need it, thanks but no thanks.
Sometimes there are grey areas. I don't know that we'd refuse to use an expensive instrument that was donated to the school that no one else wanted to use. And if a company came through and offered free internet access to everyone living in a certain area...sure! Though if that company instead offered X number of people free internet, then we'd likely decline.
I don't know about all the free/reduced internet plans, but I know there's a government funded free mobile plan that Tracfone ran (think they still do). I would have no problem signing up if we qualified and if it suited our needs.