One day you will get rugged and the small profits you though you had made will all go down the drain. The most important aspect in trading is learning for yourself how to trade rather than following signals. A huge percentage of them are even just organized scams.
Not all signal groups are scams, there are still some groups created with the purpose of sharing their views with the community and for people to discuss the next signals trend of the market. Following signal groups is not necessarily bad if you use it for reference and you should still do your own research before making a trading decision. There are many useful groups and there is also a lot of information worth following from those signal groups, as long as you do not depend on them and trust them completely, following them is not too bad.