demand不可以接动名词表被动，但可以用不定式的被动式。如：

He demands that he be told / demands to be told everything. 他要求将一切都告诉他。《牛津高阶英汉双解词典》

▲常见的表“需要”后接动名词的主动式或不定式的被动式的动词有need, want和require。

http://www.yygrammar.com/Article/201511/4379.html

根据传统语法，动名词主动形式表示被动意义只用在五种情况下：即用在动词need,want, require, deserve和be worth之后。其它情况下动名词主动形式表示被动意义就是错误。因此，网友的三个句子都是错误的。句中的demand应该为need，want。

▲demand 动词用法主要有以下几种结构

(1)demand +名词

He demanded the waiter.
他招呼服务员过来。

I demanded a definite answer.
我要求一个明确的答复。

(2)demand to do sth

He demands to know the truth.
他要求知道事情的真相。

He demanded to try again.
他要求再试一次。

(3)demand that 主语+(should)do sth 

The teacher demanded that John (should) go there at once.
老师要求约翰马上去那里。

I demanded that one of you (should) go there at once.
我要求你们中间有一个人立即到那里去。

(4)demand wh-从句

She demanded when we had started.
她询问我们是什么时候开始的。

The police demanded why he had done it.
警方询问他为什么做那事。

They demanded whether she had finished it.
他们查问她是否做完了。

▲demand 名词用法主要有以下几种结构

(1)demand of 

This is the demand of times.
这是时代的要求。

The demand of society for technicians is becoming great.
社会上对技术人员的需求日益增大。

(2)demand for

The worker's demand for higher wages is reasonable.
工人要求增加工资是合理的。

They raised the demand for a Cabinet Council.
他们提出召开内阁会议的要求

(3)in great demand/much in demand 很受欢迎;需求量大

He was much in demand as a lecturer in the US.

他的讲座在美国很受欢迎。

(4)It is one's demand that

It is our demand that she (should) go there.
她到那里去是我们的要求。

(5)make demands on （对…）提出要求

I had no right to make demands on his time.

我无权占用他的时间。

(6)on demand 一经要求;承索

Passengers must show their tickets on demand.  

查票时乘客须出示车票.

This check is payable on demand.  

这是一张见票即付的支票.

(7)the demand to do sth

I have a demand to make of him.
我对他有一个要求。

They consistently rejected the demand to remove US troops.

他们一再拒绝撤走美国部队的要求。

(8)one's demand is that sb(should)do

Our demand is that she (should) go there.
我们的要求是她到那里去。

(9)There is a great demand for

There is a great demand for English teachers all over the country.
全国到处都非常需要英语教师。

There is a great demand for typists but a poor demand for clerks at present.
目前社会上极需要打字员而不需要秘书。

There is a great demand for a cheaper edition.
对廉价版本的需求量很大。

    demand 后面不可以接动名词，但可以接不定式。如：

    I demand to know the truth. 我一定要知道真相。/ I demand to be fed. 我要求吃饭。（摘自《牛津 外研社英汉汉英词典》）

    They demanded to be told everything. 他们要求被告知每一件事。（摘自外研社 建宏《英汉多功能词典》）