I think its a bit harsh to tell them to go away, I understand the frustration when people just so consumed with the news and dont used their clear judgement and end up causing the price to fall down, but they are doing panic sell because they don't understand the situation, nobody want to sell their coin in low price, we should teach them how to handle the situations better, not asked them to quit investing
But the OP has a good point about it because they should learn that they should be prepared for anything if they will be jumping on and getting in the hyped of cryptocurrencies. At first they are helping the cause of the market because they are investing on different altcoin but when the time comes the market fall from an unavoidable reason, they start panic selling resulting to a more down market. They are contributing more to the dip, if they had believe on the altcoins they invested in the first place, then that should not happen.