Does putting a hashtag in a tweet (on Twitter) multiple times help it trend?

[Michan]

Hey, so I'm trying to help trending #PrayForLewisMighty on Twitter.
He's a 7 year old boy who's lost his fight against cancer. He's said all his goodbyes, and now he wants to trend on Twitter

So, since other people usually do it, I did over 70 tweets saying " #PrayForLewisMighty #PrayForLewisMighty #PrayForLewisMighty #PrayForLewisMighty #PrayForLewisMighty #PrayForLewisMighty", but now people are saying this will make it NOT trend since it counts as spam.
Is this true?

I know I probably look like an idiot but honestly, this little boy's last wish is more important than not looking silly on Twitter.

Thanks.
I hit the tweet limit. Still might be helpful for the future though.