Plastic electric tea kettles are safe, to a point. As long as your are monitoring while it is boiling water, it will be fine. However, if there is no water in it while it is on, you could be in trouble. This is possible if all the water evaporates out.
If used sensibly in accordance with the manufacturer's instructions, they should be no more dangerous than any other kind. As with any electrical appliance, or anything that gets hot, there is always a very slight risk. But a reputable brand, used carefully, should present no problem.
They are reasonably safe. The water does not get hot enough to melt the plastic. Of course, they can be dangerous if mis-used, just like any other electrical applicance. Additionally, just like with a pot of hot water, scalds are possible with spills.
no they are not safe plastic is a bad way to cook with like heating up on stove or cooking in microwave is not good for plastic at all look at a plastic plate sometimes in heat it might melt to
a blob plus it smells. be safe an buy metal