Where there is a hashtag you can bet your life there's a company trying to cash in on it with there own 'quirky' take.
Sometimes it's not even a company but someone you just hope would know better - like your own government.
This was the Department for Work and Pensions' attempt to join the #BackToTheFuture trend on Wednesday...
Oh dear. First of all that is not Marty McFly or Doc Brown.
The Guardian's Alex Hern had a pretty solid point.
But a lot of people chipped in with some helpful advice.
Or the odd film reference.
Other's weren't quite so succinct.
The DWP weren't alone - Visit Parliament tried to get in the act too.
.... which also failed.
@visitparliament@UKParliament@UKHouseofLords@HouseofCommons@UKParlArchives I hope so, they can warn us about the Tories
— David Preston (@Crazy_DavidP) October 21, 2015
But the UK wasn't alone, a similar attempt by the Russian Embassy similarly backfired.
Here are seven reasons why our future is better than Back To The Future:
