That's not true, brite.
Loki is considered to be a deity of change, and is also called upon when change is either being brought into your life or needs to be. He is unpredictable, as change is, but not unreliable. He is beginning to be viewed in a more favorable light by Heathens as time goes on.
Loki is honored by Lokeans, who are groups of Heathens. He is also honored by Rokkatruars. You can find some information on both of those paths here in the forums. However, the honoring of Loki is largely new- as he was not traditionally worked with in the past by our ancestors (though I've seen some new evidence disputing that). People who work with Loki tend to find their own way of doing it, and it tends to be very individualized.
Here's some sources for you to look at:
If you would like, send me a message and we can discuss some of this. Loki is the main deity I've worked with for nearly fourteen years.