About

A PLZ account is a regular DeviantART account which was created purely for the use of the avatar. Usually the Icons are meme-related and they are extremely popular in DeviantART.
They are called Plz Accounts due to the mass majority of them ending in the 3 letters ‘PLZ’ to not only ensure a usable DeviantART name is not taken, but to also identify their purpose.

It is hard to determine when the first PLZ was created, but the oldest accounts are 2 to 6 years old.
Like the wtfplz which Unfortunately was Banned and the Avatar was removed.

Types of plz accounts

Normal

fellaplz
mudkipplz
Spongebobrapefaceplz
weegeeplz
ohfuckplz
imhappyplz
foreveraloneplz
fuckyeaplz
y-u-noplz

The avatar can be a 50 × 50 pixels picture, which can be either Animated or Static.

Combo

There are PLZ accounts which can be combined together, to form a bigger image. A good example is the Wormhappyplz (pictured), created by Billythegoat101. It is a worm version of the Awesome Smile, with various things to customize it, like a bikini, a big mouth, arms, etc.

Longcatarmplz, longcatheadplz, longcatbodyplz, longcatbody2plz, longcatbody3plz, longcatfeetplz and longcattailplz together form a picture of longcat.

Reaction Guys is one of the Newest Examples.

"Complete-it-yourself" Plz accounts

The "La"

The La is an emoticon (not a plz account) in deviantArt, with shows a green emoticon with his mouth open, shaking his arms. The emoticon is very popular on deviantArt, which led to many variations.

(Complete list of La's)

Use

The Users just need to Correctly type the Right HTML Code that DeviantART Provides, to Succeed the Combo.

For Example, if you type Correctly the Following HTML code in DeviantART
:iconorelseyouwilldieplz::iconsaysplz:Join me Link and I will make your face the greatest in Koridai.
:iconmystuffplz::iconsaysplz:No way! You’re boring.
:iconyoumustdieplz::iconsaysplz:Then you must die!
:iconexplosionplz::iconsaysplz: Link dies

You will Get the Following Story with Images!

Join me Link and I will make your face the greatest in Koridai.
No way! You're boring.
Then you must die!
Link dies

Of course, some Users create and use PLZ account for personal use, (Mostly for Role playing or to Spread a Message)

Unfortunately PLZ accounts can also be used for Spamming and Trolling as well.

Problem?

Spread

Due to the popularity and the big number of PLZ accounts, some users created Accounts or Groups, where they list the most of them.
 
Some Examples are:
icon-listing
collect-icons
plzcollectorz
plz-whoswho
everyplz
pokemonplzicons
yu-gi-ohplzicons