Economically speaking, as long as your blockchain fork doesn't cause the technical death of Bitcoin, few people will accept your inflationary coins. Sure, free money is nice but would you give someone a silver or gold coin in exchange for currency designed to hyperinflate?
That's certainly true for one version of the attack (the one which continues with 100BTC). It is not true for the version which continues with the 50BTC. And: I trust more in the greed of the people than in their rationality. No, I am not happy about this.
As far as network effects, obviously this has no effect on Bitcoin other than as an attempt to siphon users to your blockchain fork and away from the main chain. That hasn't worked so well for most of the alt currencies and there's no reason to believe it would work for an inflationary fork of Bitcoin based on the paragraph above this one.
The alternative chains we saw thus far were based, to the degree I know and IMHO, on changes which did not produce visible benefits to the user and thus were not able to activate the greed reflex.