If developers get hard work to increase network capacity to accommodate rubbish and shitcoin, I'm of course against it. Bitcoin network is fine so far, I can even send with a fee of 1 satoshi before the network is littered with rubbish. I have no problem with altcoins even if they use and create another network. But if that altcoin use the Bitcoin network just to show up and marketing the product, I think that's gone too far. As far I know, The new altcoin is use various methods to sell his product, ICO, IEO, and etc. Now, they sell altcoins in the shadow of btc. They use that methode, so that buyers think all that altcoin is part of BTC (because inside on BTC network).