Comment # 8 on bug 1175641 from Johannes Segitz

accept_redirects is a double edge sword. On the one hand it's a useful tool to
improve routing, but unfortunately it's also possible to misuse it to
maliciously redirect packet.

From a security POV I don't want to have it activated by default. Given that
wicked manages to do this correctly without this I would suggest we try to find
a way to get NetworkManager to behave similarly. Maybe the wicked devs can help
out here.