Reraising a LAG?

[Eevee]

This is a PokerStars 55+5. Villian had raised the last 4 times on the button when it was folded to him. ALso, he was caught raising 55 in MP. My read was that he was a lag. Just wondering if people make this move cus I usually dont. And if not, what are u standards for making this play?

PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (6 handed) converter

Button (t1545)
SB (t4015)
Hero (t1815)
UTG (t2020)
MP (t2400)
CO (t1705)

Preflop: Hero is BB with A[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/heart.gif[/img].
<font color="#666666">3 folds</font>, <font color="#CC3333">Button raises to t600</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to t1815</font>

[img]/images/graemlins/confused.gif[/img]

-EV