Can tables cause memory leak?

Can tables cause memory leak?
If something like this is used often.

for u, c in pairs(workspace:GetChildren()) do
if c:findFirstChild(“Humanoid”) then
table.insert(Ignore,c)
end
end

for u, c in pairs(PlayerEffects:GetChildren()) do
if c:IsA(“BasePart”) then
table.insert(Ignore,c)
end
end

There’s a lot of “depends” here. A table is a reference to a memory address which is a list of memory addresses on its own.

0xFF[1] = 0xAA

Where 0xAA may be a string or object address.

So if your tables and their values are never collected by the garbage collector - sure. It can hold memory forever. But this depends on the rest of your code. Right now, there’s no telling.